Kraig Biocraft Laboratories Inc (KBLB)

[downsideup]

"Kite string and cotton thread are comparable in tensile strength to spidersilk"

That's completely wrong. Not even close. Tensile strength is measured as a function of variation in material density. What you're probably talking about is "tenacity"... which we're not talking about for a reason, when making comparisons between the properties inherent in different materials.

It is interesting to note, still that ALL "natural" fibers will tend to have significant "natural" variation in them, and that includes silk produced by spiders and silk worms... which varies for all kinds of reasons.

While you're learning what tensile strength is... and something about testing...

https://en.wikipedia.org/wiki/Tensile_strength

http://www.astm.org/Standards/D1294.htm

You might pay attention to the note, and its reference: "^c The strength of spider silk is highly variable. It depends on many factors including kind of silk (Every spider can produce several for sundry purposes.), species, age of silk, temperature, humidity, swiftness at which stress is applied during testing, length stress is applied, and way the silk is gathered (forced silking or natural spinning).[32] The value shown in the table, 1000 MPa, is roughly representative of the results from a few studies involving several different species of spider however specific results varied greatly.[33]"

One of the key competitive advantages that artificially manufactured fibers have... is that they can be produced in controlled environments that tend to reduce or eliminate the sources of variation... leading to much better control over the properties of things you make... compared to things made by worms and spiders.

An artificial spinning process you control... is always going to give better and more uniform results than a natural process that is subjected to all kinds of sources of natural variation...

AMSilk has the right focus...

KBLB... is trying to improve on the buggy whip...